President Barack Obama has defeated Mitt Romney in Oregon, but results are coming in at a margin slightly smaller than Obama's big victory in the state four years ago.

With just under half the vote counted, Obama was ahead with 55 percent, compared with 42 percent for Romney.

In 2008, Obama defeated John McCain by 16 percentage points.

As in other parts of the country, enthusiasm for Obama has lessened in Oregon because some voters feel like he hasn't lived up to his promises of hope and change and because of the struggling economy. (AP)

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